Firstly prepare the vegetables. Wash and trim the purple sprouting broccoli, the asparagus and the radish. Slice the broccoli and asparagus into 3 cm pieces, and slice the radish thinly. Place the radish in a bowl of cold water.
Using a double layered steamer, boil some water and steam the purple sprouting broccoli, the asparagus pieces and the peas for approximately 5-7 minutes. The vegetables should be quite tender, but still green and slightly crisp. Remove the vegetables from the steamer and set aside to cool on a clean preparation tray.
In a little jug mix together the sesame seeds, rapeseed oil, zest and juice of the lime, the soya sauce, sugar, a pinch of sea salt and a generous grating of black pepper.
In a roomy salad bowl, mix together the steamed purple sprouting broccoli, asparagus and peas. Add the drained radish slices.
Add the soya and lime dressing. Toss the salad well. Serve.